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thunderbolt: Call tb_switch_put() once DisplayPort bandwidth request is finished

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When handling DisplayPort bandwidth request tb_switch_find_by_route() is
called and it returns a router structure with reference count increased.
In order to avoid resource leak call tb_switch_put() when finished.

Fixes: 6ce3563520 ("thunderbolt: Add support for DisplayPort bandwidth allocation mode")
Cc: stable@vger.kernel.org
Signed-off-by: Gil Fine <gil.fine@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Gil Fine 2023-08-10 23:18:25 +03:00 committed by Mika Westerberg
parent 8a749fd1a8
commit ec4405ed92
1 changed files with 6 additions and 4 deletions
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10
drivers/thunderbolt/tb.c
View file

@ -1907,14 +1907,14 @@ static void tb_handle_dp_bandwidth_request(struct work_struct *work)
in = &sw->ports[ev->port];
if (!tb_port_is_dpin(in)) {
tb_port_warn(in, "bandwidth request to non-DP IN adapter\n");
goto unlock;
goto put_sw;
}
tb_port_dbg(in, "handling bandwidth allocation request\n");
if (!usb4_dp_port_bandwidth_mode_enabled(in)) {
tb_port_warn(in, "bandwidth allocation mode not enabled\n");
goto unlock;
goto put_sw;
}
ret = usb4_dp_port_requested_bandwidth(in);
@ -1923,7 +1923,7 @@ static void tb_handle_dp_bandwidth_request(struct work_struct *work)
tb_port_dbg(in, "no bandwidth request active\n");
else
tb_port_warn(in, "failed to read requested bandwidth\n");
goto unlock;
goto put_sw;
}
requested_bw = ret;
@ -1932,7 +1932,7 @@ static void tb_handle_dp_bandwidth_request(struct work_struct *work)
tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL);
if (!tunnel) {
tb_port_warn(in, "failed to find tunnel\n");
goto unlock;
goto put_sw;
}
out = tunnel->dst_port;
@ -1959,6 +1959,8 @@ static void tb_handle_dp_bandwidth_request(struct work_struct *work)
tb_recalc_estimated_bandwidth(tb);
}
put_sw:
tb_switch_put(sw);
unlock:
mutex_unlock(&tb->lock);